It's got a pause/play button and they've lasted me about 3-4 months so far. Pretty good for me considering I take them in and out of my bag/pocket everyday, so I'd say there durable. I think the mic is only for iPhone 3/3GS... I've got a 4 & don't need the mic so it doesn't affect me.

I just use my normal iPhone headphones when I'm at the gym but I wouldn't know if they would stay in whilst running and shit, I only ever listen to them when I'm doing weights etc find them waaaay too distracting when running

If you have money, I d go for Sennheiser. My husband has great ones, you can switch them to sound proof, so you don't hear anything, but you can also switch them to letting other sounds through as well, which is probably better if you are out on the street jogging. great sound too. In any case you don't annoy anybody else with the sounds, I really can't stand sitting on the bus having to listen to other's people music because they haven't got sound proof headphones.